Lepidocyclus or Hiscobeccus Brachiopod

This fossil bachiopod appears to be either a Hiscobeccus capax and Lepidocyclus perlamellosus. The book Cincinnati Fossils An Elementary Guide to the Ordovician Rocks and Fossils of the Cincinnati, Ohio, Region edited by R.A. Davis (Cincinnati Museum Center, 1998) on page 49 lists the Hiscobeccus as an "Articulate brachiopod. Note the three major plications in the sulcus, the rounded beak, and the growth-lines, crossing the plications." and the Lepidocyclus perlamellosus as "Differs from the previous species in characteristics of the shell interior, but it tends to be larger than the previous species and to larger than the previous species and to have more distinct growth-lines."
Brachiopds are found in the Richmondian stage and this fossil was found in Jefferson County, Kentucky, USA.

Pennsylvania's Cornwall Mine Magnetite

The Cornwall Mine of Lebanon County Pennslyvania, USA was one of the largest iron ore producers in the eastern United States. Opened in 1732 and operated until the early 1970s the mine is estimated to have produced over 100 million tons or ore. In addition, over 60,000 ounces of gold and 400,000 ounces of silver were processed. In June 1972, Hurricane Agnes knocked out the power at the mine thus rendering the pumps unusable. The rains the storm brought flooded the mine shafts and Bethelem Steel decided to close the mines after that.

Micro-mineral specimen of magnetite from the mine. Collected by Milt Leet who was a mining engineer there till mine closed. The book Mineral Collecting in Pennsylvania by Davis M. Lapham and Alan R. Geyer (Pennsylvania Geological Survey 3rd Ed. 1969) describes magnetite found at the mine as "octahedrons, dodecahedrons, plates, massive in ore and along top surface of diabase in small crystals". (page 108)

mindat.org lists 69 different types of minerals found at this mining locality.

Eurypterus lacustris Fossil

An Eurypterus lacustris fossil displayed at Smithsonian National Museum of Natural History (Washington DC). The fossil was found in New York, USA. Fossil dates to the Late Silurian Period.

Thanks to my cousin for the photo.